Tubular pen



FIG. 1 is a right front perspective view of a tubular pen with the capon, showing my new design;

FIG. 2 is an exploded right front perspective view thereof, with the capremoved to expose the tubular writing fluid element;

FIG. 3 is a top plan view of FIG. 1;

FIG. 4 is a right side elevation view of FIG. 1, the left side being amirror image thereof;

FIG. 5 is a bottom plan view of FIG. 1;

FIG. 6 is a left side elevation end view of FIG. 1; and,

FIG. 7 is a right side elevation end view of FIG. 1.

The ornamental design for a tubular pen, as shown and described. 